rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6740/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=12817, q=1017 ncpus=2)
task:udevd           state:R  running task     stack:0     pid:6740  tgid:6740  ppid:6143   task_flags:0x400140 flags:0x00000008
Call trace:
 __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x141c/0x2a14 kernel/sched/core.c:6786
 preempt_schedule_irq+0x80/0x188 kernel/sched/core.c:7109
 arm64_preempt_schedule_irq+0x44/0x58 arch/arm64/kernel/entry-common.c:305
 __el1_irq arch/arm64/kernel/entry-common.c:656 [inline]
 el1_interrupt+0x3c/0x54 arch/arm64/kernel/entry-common.c:668
 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:673
 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592
 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P)
 arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P)
 lock_release+0x270/0x39c kernel/locking/lockdep.c:5895 (P)
 rcu_lock_release+0x30/0x40 include/linux/rcupdate.h:341
 rcu_read_unlock include/linux/rcupdate.h:871 [inline]
 __page_table_check_zero+0x3ac/0x414 mm/page_table_check.c:145
 page_table_check_free include/linux/page_table_check.h:43 [inline]
 free_pages_prepare mm/page_alloc.c:1249 [inline]
 __free_frozen_pages+0xc10/0xd2c mm/page_alloc.c:2706
 free_frozen_pages+0x14/0x20 mm/page_alloc.c:2744
 __free_slab+0x110/0x1e8 mm/slub.c:2688
 free_slab+0x24/0x120 mm/slub.c:2711
 discard_slab mm/slub.c:2717 [inline]
 __put_partials+0x19c/0x244 mm/slub.c:3186
 put_cpu_partial+0x164/0x1c0 mm/slub.c:3261
 __slab_free+0x1b0/0x280 mm/slub.c:4513
 do_slab_free mm/slub.c:4595 [inline]
 ___cache_free+0x150/0x170 mm/slub.c:4701
 qlink_free+0x48/0x94 mm/kasan/quarantine.c:163
 qlist_free_all+0x44/0xb8 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x118/0x124 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x2c/0x88 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_noprof+0x238/0x3e8 mm/slub.c:4204
 mt_alloc_one lib/maple_tree.c:176 [inline]
 mas_alloc_nodes+0x268/0x788 lib/maple_tree.c:1249
 mas_node_count_gfp lib/maple_tree.c:1331 [inline]
 mas_preallocate+0x4fc/0x7e8 lib/maple_tree.c:5534
 vma_iter_prealloc mm/vma.h:463 [inline]
 __split_vma+0x2b0/0x924 mm/vma.c:525
 vms_gather_munmap_vmas+0x3fc/0xf54 mm/vma.c:1375
 do_vmi_align_munmap+0x1e0/0x310 mm/vma.c:1522
 do_vmi_munmap+0x1dc/0x260 mm/vma.c:1579
 __vm_munmap+0x218/0x390 mm/vma.c:3108
 __do_sys_munmap mm/mmap.c:1084 [inline]
 __se_sys_munmap mm/mmap.c:1081 [inline]
 __arm64_sys_munmap+0x64/0x7c mm/mmap.c:1081
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596